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CVE-2022-21213

24
FAUCET Score

CVE-2022-21213 is a high-severity vulnerability affecting all versions of the 'mout' JavaScript package. It stems from an incomplete fix for a previous vulnerability (CVE-2020-7792), allowing attackers to exploit unchecked keys in the deepFillIn and deepMixIn functions, leading to potential denial of service. With a CVSS score of 7.5, this vulnerability has a low attack complexity and does not require user interaction or privileges, making it easily exploitable over the network. Currently, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:a:moutjs:mout:*:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.96%
Probability of exploitation in next 30 days
EPSS Percentile
78.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0196 is in the 62nd percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

npmpatch availablevia ghsa
Product: moutFixed in: 1.2.4

Vendor Advisories (1)

npmGHSA-vvv8-xw5f-3f88high

Prototype Pollution in mout

Jun 18, 2022

References

github.com / mout/mout/blob/master/src/object/deepFillIn.js
ExploitThird Party Advisory
github.com / mout/mout/blob/master/src/object/deepMixIn.js
ExploitThird Party Advisory
snyk.io / vuln/SNYK-JAVA-ORGWEBJARS-2870623
ExploitThird Party Advisory
snyk.io / vuln/SNYK-JAVA-ORGWEBJARSNPM-2870622
ExploitThird Party Advisory
snyk.io / vuln/SNYK-JS-MOUT-2342654
ExploitThird Party Advisory